<!DOCTYPE HTML>
<html lang="en" class="sidebar-visible no-js light">
    <head>
        <!-- Book generated using mdBook -->
        <meta charset="UTF-8">
        <title>panic! - Discovery</title>


        <!-- Custom HTML head -->
        
        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
        <meta name="description" content="Discover the world of microcontrollers through Rust">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <meta name="theme-color" content="#ffffff" />

        <link rel="icon" href="../favicon.svg">
        <link rel="shortcut icon" href="../favicon.png">
        <link rel="stylesheet" href="../css/variables.css">
        <link rel="stylesheet" href="../css/general.css">
        <link rel="stylesheet" href="../css/chrome.css">
        <link rel="stylesheet" href="../css/print.css" media="print">

        <!-- Fonts -->
        <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css">
        <link rel="stylesheet" href="../fonts/fonts.css">

        <!-- Highlight.js Stylesheets -->
        <link rel="stylesheet" href="../highlight.css">
        <link rel="stylesheet" href="../tomorrow-night.css">
        <link rel="stylesheet" href="../ayu-highlight.css">

        <!-- Custom theme stylesheets -->
        <link rel="stylesheet" href="../custom.css">

    </head>
    <body>
        <!-- Provide site root to javascript -->
        <script type="text/javascript">
            var path_to_root = "../";
            var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light";
        </script>

        <!-- Work around some values being stored in localStorage wrapped in quotes -->
        <script type="text/javascript">
            try {
                var theme = localStorage.getItem('mdbook-theme');
                var sidebar = localStorage.getItem('mdbook-sidebar');

                if (theme.startsWith('"') && theme.endsWith('"')) {
                    localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
                }

                if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
                    localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
                }
            } catch (e) { }
        </script>

        <!-- Set the theme before any content is loaded, prevents flash -->
        <script type="text/javascript">
            var theme;
            try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
            if (theme === null || theme === undefined) { theme = default_theme; }
            var html = document.querySelector('html');
            html.classList.remove('no-js')
            html.classList.remove('light')
            html.classList.add(theme);
            html.classList.add('js');
        </script>

        <!-- Hide / unhide sidebar before it is displayed -->
        <script type="text/javascript">
            var html = document.querySelector('html');
            var sidebar = 'hidden';
            if (document.body.clientWidth >= 1080) {
                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
                sidebar = sidebar || 'visible';
            }
            html.classList.remove('sidebar-visible');
            html.classList.add("sidebar-" + sidebar);
        </script>

        <nav id="sidebar" class="sidebar" aria-label="Table of contents">
            <div class="sidebar-scrollbox">
                <ol class="chapter"><li class="chapter-item expanded affix "><a href="../index.html">Introduction</a></li><li class="chapter-item expanded "><a href="../01-background/index.html"><strong aria-hidden="true">1.</strong> Background</a></li><li class="chapter-item expanded "><a href="../02-requirements/index.html"><strong aria-hidden="true">2.</strong> Hardware/knowledge requirements</a></li><li class="chapter-item expanded "><a href="../03-setup/index.html"><strong aria-hidden="true">3.</strong> Setting up a development environment</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../03-setup/linux.html"><strong aria-hidden="true">3.1.</strong> Linux</a></li><li class="chapter-item expanded "><a href="../03-setup/windows.html"><strong aria-hidden="true">3.2.</strong> Windows</a></li><li class="chapter-item expanded "><a href="../03-setup/macos.html"><strong aria-hidden="true">3.3.</strong> macOS</a></li><li class="chapter-item expanded "><a href="../03-setup/verify.html"><strong aria-hidden="true">3.4.</strong> Verify the installation</a></li></ol></li><li class="chapter-item expanded "><a href="../04-meet-your-hardware/index.html"><strong aria-hidden="true">4.</strong> Meet your hardware</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/index.html"><strong aria-hidden="true">5.</strong> LED roulette</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../05-led-roulette/build-it.html"><strong aria-hidden="true">5.1.</strong> Build it</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/flash-it.html"><strong aria-hidden="true">5.2.</strong> Flash it</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/debug-it.html"><strong aria-hidden="true">5.3.</strong> Debug it</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/the-led-and-delay-abstractions.html"><strong aria-hidden="true">5.4.</strong> The led and delay abstractions</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/the-challenge.html"><strong aria-hidden="true">5.5.</strong> The challenge</a></li><li class="chapter-item expanded "><a href="../05-led-roulette/my-solution.html"><strong aria-hidden="true">5.6.</strong> My solution</a></li></ol></li><li class="chapter-item expanded "><a href="../06-hello-world/index.html"><strong aria-hidden="true">6.</strong> Hello, world!</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../06-hello-world/panic.html" class="active"><strong aria-hidden="true">6.1.</strong> panic!</a></li></ol></li><li class="chapter-item expanded "><a href="../07-registers/index.html"><strong aria-hidden="true">7.</strong> Registers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../07-registers/rtrm.html"><strong aria-hidden="true">7.1.</strong> RTRM</a></li><li class="chapter-item expanded "><a href="../07-registers/optimization.html"><strong aria-hidden="true">7.2.</strong> (mis)Optimization</a></li><li class="chapter-item expanded "><a href="../07-registers/bad-address.html"><strong aria-hidden="true">7.3.</strong> 0xBAAAAAAD address</a></li><li class="chapter-item expanded "><a href="../07-registers/spooky-action-at-a-distance.html"><strong aria-hidden="true">7.4.</strong> Spooky action at a distance</a></li><li class="chapter-item expanded "><a href="../07-registers/type-safe-manipulation.html"><strong aria-hidden="true">7.5.</strong> Type safe manipulation</a></li></ol></li><li class="chapter-item expanded "><a href="../08-leds-again/index.html"><strong aria-hidden="true">8.</strong> LEDs, again</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../08-leds-again/power.html"><strong aria-hidden="true">8.1.</strong> Power</a></li><li class="chapter-item expanded "><a href="../08-leds-again/configuration.html"><strong aria-hidden="true">8.2.</strong> Configuration</a></li><li class="chapter-item expanded "><a href="../08-leds-again/the-solution.html"><strong aria-hidden="true">8.3.</strong> The solution</a></li></ol></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/index.html"><strong aria-hidden="true">9.</strong> Clocks and timers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../09-clocks-and-timers/for-loop-delays.html"><strong aria-hidden="true">9.1.</strong> for loop delays</a></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/nop.html"><strong aria-hidden="true">9.2.</strong> NOP</a></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/one-shot-timer.html"><strong aria-hidden="true">9.3.</strong> One-shot timer</a></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/initialization.html"><strong aria-hidden="true">9.4.</strong> Initialization</a></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/busy-waiting.html"><strong aria-hidden="true">9.5.</strong> Busy waiting</a></li><li class="chapter-item expanded "><a href="../09-clocks-and-timers/putting-it-all-together.html"><strong aria-hidden="true">9.6.</strong> Putting it all together</a></li></ol></li><li class="chapter-item expanded "><a href="../10-serial-communication/index.html"><strong aria-hidden="true">10.</strong> Serial communication</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../10-serial-communication/nix-tooling.html"><strong aria-hidden="true">10.1.</strong> *nix tooling</a></li><li class="chapter-item expanded "><a href="../10-serial-communication/windows-tooling.html"><strong aria-hidden="true">10.2.</strong> Windows tooling</a></li><li class="chapter-item expanded "><a href="../10-serial-communication/loopbacks.html"><strong aria-hidden="true">10.3.</strong> Loopbacks</a></li></ol></li><li class="chapter-item expanded "><a href="../11-usart/index.html"><strong aria-hidden="true">11.</strong> USART</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../11-usart/send-a-single-byte.html"><strong aria-hidden="true">11.1.</strong> Send a single byte</a></li><li class="chapter-item expanded "><a href="../11-usart/send-a-string.html"><strong aria-hidden="true">11.2.</strong> Send a string</a></li><li class="chapter-item expanded "><a href="../11-usart/buffer-overrun.html"><strong aria-hidden="true">11.3.</strong> Buffer overrun</a></li><li class="chapter-item expanded "><a href="../11-usart/uprintln.html"><strong aria-hidden="true">11.4.</strong> uprintln!</a></li><li class="chapter-item expanded "><a href="../11-usart/receive-a-single-byte.html"><strong aria-hidden="true">11.5.</strong> Receive a single byte</a></li><li class="chapter-item expanded "><a href="../11-usart/echo-server.html"><strong aria-hidden="true">11.6.</strong> Echo server</a></li><li class="chapter-item expanded "><a href="../11-usart/reverse-a-string.html"><strong aria-hidden="true">11.7.</strong> Reverse a string</a></li><li class="chapter-item expanded "><a href="../11-usart/my-solution.html"><strong aria-hidden="true">11.8.</strong> My solution</a></li></ol></li><li class="chapter-item expanded "><a href="../12-bluetooth-setup/index.html"><strong aria-hidden="true">12.</strong> Bluetooth setup</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../12-bluetooth-setup/linux.html"><strong aria-hidden="true">12.1.</strong> Linux</a></li><li class="chapter-item expanded "><a href="../12-bluetooth-setup/loopback.html"><strong aria-hidden="true">12.2.</strong> Loopback</a></li><li class="chapter-item expanded "><a href="../12-bluetooth-setup/at-commands.html"><strong aria-hidden="true">12.3.</strong> AT commands</a></li></ol></li><li class="chapter-item expanded "><a href="../13-serial-over-bluetooth/index.html"><strong aria-hidden="true">13.</strong> Serial over Bluetooth</a></li><li class="chapter-item expanded "><a href="../14-i2c/index.html"><strong aria-hidden="true">14.</strong> I2C</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../14-i2c/the-general-protocol.html"><strong aria-hidden="true">14.1.</strong> The general protocol</a></li><li class="chapter-item expanded "><a href="../14-i2c/lsm303dlhc.html"><strong aria-hidden="true">14.2.</strong> LSM303DLHC</a></li><li class="chapter-item expanded "><a href="../14-i2c/read-a-single-register.html"><strong aria-hidden="true">14.3.</strong> Read a single register</a></li><li class="chapter-item expanded "><a href="../14-i2c/the-solution.html"><strong aria-hidden="true">14.4.</strong> The solution</a></li><li class="chapter-item expanded "><a href="../14-i2c/read-several-registers.html"><strong aria-hidden="true">14.5.</strong> Read several registers</a></li></ol></li><li class="chapter-item expanded "><a href="../15-led-compass/index.html"><strong aria-hidden="true">15.</strong> LED compass</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../15-led-compass/take-1.html"><strong aria-hidden="true">15.1.</strong> Take 1</a></li><li class="chapter-item expanded "><a href="../15-led-compass/solution-1.html"><strong aria-hidden="true">15.2.</strong> Solution 1</a></li><li class="chapter-item expanded "><a href="../15-led-compass/take-2.html"><strong aria-hidden="true">15.3.</strong> Take 2</a></li><li class="chapter-item expanded "><a href="../15-led-compass/solution-2.html"><strong aria-hidden="true">15.4.</strong> Solution 2</a></li><li class="chapter-item expanded "><a href="../15-led-compass/magnitude.html"><strong aria-hidden="true">15.5.</strong> Magnitude</a></li><li class="chapter-item expanded "><a href="../15-led-compass/calibration.html"><strong aria-hidden="true">15.6.</strong> Calibration</a></li></ol></li><li class="chapter-item expanded "><a href="../16-punch-o-meter/index.html"><strong aria-hidden="true">16.</strong> Punch-o-meter</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../16-punch-o-meter/gravity-is-up.html"><strong aria-hidden="true">16.1.</strong> Gravity is up?</a></li><li class="chapter-item expanded "><a href="../16-punch-o-meter/the-challenge.html"><strong aria-hidden="true">16.2.</strong> The challenge</a></li><li class="chapter-item expanded "><a href="../16-punch-o-meter/my-solution.html"><strong aria-hidden="true">16.3.</strong> My solution</a></li></ol></li><li class="chapter-item expanded "><a href="../explore.html"><strong aria-hidden="true">17.</strong> What's left for you to explore</a></li><li class="spacer"></li><li class="chapter-item expanded affix "><a href="../appendix/1-general-troubleshooting/index.html">General troubleshooting</a></li><li class="chapter-item expanded affix "><a href="../appendix/2-how-to-use-gdb/index.html">How to use GDB</a></li><li class="spacer"></li></ol>
            </div>
            <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
        </nav>

        <div id="page-wrapper" class="page-wrapper">

            <div class="page">
                                <div id="menu-bar-hover-placeholder"></div>
                <div id="menu-bar" class="menu-bar sticky bordered">
                    <div class="left-buttons">
                        <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
                            <i class="fa fa-bars"></i>
                        </button>
                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
                            <i class="fa fa-paint-brush"></i>
                        </button>
                        <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
                            <li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
                        </ul>
                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                            <i class="fa fa-search"></i>
                        </button>
                    </div>

                    <h1 class="menu-title">Discovery</h1>

                    <div class="right-buttons">
                        <a href="../print.html" title="Print this book" aria-label="Print this book">
                            <i id="print-button" class="fa fa-print"></i>
                        </a>
                        <a href="https://github.com/rust-embedded/discovery/" title="Git repository" aria-label="Git repository">
                            <i id="git-repository-button" class="fa fa-github"></i>
                        </a>

                    </div>
                </div>

                <div id="search-wrapper" class="hidden">
                    <form id="searchbar-outer" class="searchbar-outer">
                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
                    </form>
                    <div id="searchresults-outer" class="searchresults-outer hidden">
                        <div id="searchresults-header" class="searchresults-header"></div>
                        <ul id="searchresults">
                        </ul>
                    </div>
                </div>

                <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
                <script type="text/javascript">
                    document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
                    document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
                        link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
                    });
                </script>

                <div id="content" class="content">
                    <main>
                        <h1 id="panic"><a class="header" href="#panic"><code>panic!</code></a></h1>
<p>The <code>panic!</code> macro also sends its output to the ITM!</p>
<p>Change the <code>main</code> function to look like this:</p>
<pre><pre class="playground"><code class="language-rust">#[entry]
fn main() -&gt; ! {
    panic!(&quot;Hello, world!&quot;);
}
</code></pre></pre>
<p>Before running one other suggestion, I find it inconvenient to have to
confirm when quitting gdb. Add the following file in your home
directory <code>~/.gdbinit</code> so that it quits immediately:</p>
<pre><code class="language-console">$ cat ~/.gdbinit
define hook-quit
  set confirm off
end
</code></pre>
<p>OK, now use <code>cargo run</code> and it stops at the first line of <code>fn main()</code>:</p>
<pre><code class="language-console">$ cargo run
   Compiling hello-world v0.2.0 (~/embedded-discovery/src/06-hello-world)
    Finished dev [unoptimized + debuginfo] target(s) in 0.11s
     Running `arm-none-eabi-gdb -q -x ../openocd.gdb ~/embedded-discovery/target/thumbv7em-none-eabihf/debug/hello-world`
Reading symbols from ~/embedded-discovery/target/thumbv7em-none-eabihf/debug/hello-world...
hello_world::__cortex_m_rt_main () at ~/embedded-discovery/src/06-hello-world/src/main.rs:10
10          panic!(&quot;Hello, world!&quot;);
Loading section .vector_table, size 0x194 lma 0x8000000
Loading section .text, size 0x20fc lma 0x8000194
Loading section .rodata, size 0x554 lma 0x8002290
Start address 0x08000194, load size 10212
Transfer rate: 17 KB/sec, 3404 bytes/write.
Breakpoint 1 at 0x80001f0: file ~/embedded-discovery/src/06-hello-world/src/main.rs, line 8.
Note: automatically using hardware breakpoints for read-only addresses.
Breakpoint 2 at 0x8000222: file ~/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.13/src/lib.rs, line 570.
Breakpoint 3 at 0x800227a: file ~/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.13/src/lib.rs, line 560.

Breakpoint 1, hello_world::__cortex_m_rt_main_trampoline () at ~/embedded-discovery/src/06-hello-world/src/main.rs:8
8       #[entry]
hello_world::__cortex_m_rt_main () at ~/embedded-discovery/src/06-hello-world/src/main.rs:10
10          panic!(&quot;Hello, world!&quot;);
(gdb)
</code></pre>
<p>We'll use short command names to save typing, enter <code>c</code> then the <code>Enter</code> or <code>Return</code> key:</p>
<pre><code>(gdb) c
Continuing.
</code></pre>
<p>If all is well you'll see some new output in the <code>itmdump</code> terminal.</p>
<pre><code class="language-console">$ # itmdump terminal
(..)
panicked at 'Hello, world!', src/06-hello-world/src/main.rs:10:5
</code></pre>
<p>Then type <code>Ctrl-c</code> which breaks out of a loop in the runtime:</p>
<pre><code class="language-text">^C
Program received signal SIGINT, Interrupt.
0x0800115c in panic_itm::panic (info=0x20009fa0) at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-itm-0.4.2/src/lib.rs:57
57	        atomic::compiler_fence(Ordering::SeqCst);
</code></pre>
<p>Ultimately, <code>panic!</code> is just another function call so you can see it leaves behind
a trace of function calls. This allows you to use <code>backtrace</code> or just <code>bt</code> and to see
call stack that caused the panic:</p>
<pre><code class="language-text">(gdb) bt
#0  panic_itm::panic (info=0x20009fa0) at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-itm-0.4.2/src/lib.rs:47
#1  0x080005c2 in core::panicking::panic_fmt () at library/core/src/panicking.rs:92
#2  0x0800055a in core::panicking::panic () at library/core/src/panicking.rs:50
#3  0x08000210 in hello_world::__cortex_m_rt_main () at src/06-hello-world/src/main.rs:10
#4  0x080001f4 in hello_world::__cortex_m_rt_main_trampoline () at src/06-hello-world/src/main.rs:8
</code></pre>
<p>Another thing we can do is catch the panic <em>before</em> it does the logging.
So we'll do several things; reset to the beginning, disable breakpoint 1,
set a new breakpoint at <code>rust_begin_unwind</code>, list the break points and then continue:</p>
<pre><code class="language-text">(gdb) monitor reset halt
Unable to match requested speed 1000 kHz, using 950 kHz
Unable to match requested speed 1000 kHz, using 950 kHz
adapter speed: 950 kHz
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000194 msp: 0x2000a000

(gdb) disable 1

(gdb) break rust_begin_unwind 
Breakpoint 4 at 0x800106c: file ~/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-itm-0.4.2/src/lib.rs, line 47.

(gdb) info break
Num     Type           Disp Enb Address    What
1       breakpoint     keep n   0x080001f0 in hello_world::__cortex_m_rt_main_trampoline 
                                           at ~/prgs/rust/tutorial/embedded-discovery/src/06-hello-world/src/main.rs:8
        breakpoint already hit 1 time
2       breakpoint     keep y   0x08000222 in cortex_m_rt::DefaultHandler_ 
                                           at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.13/src/lib.rs:570
3       breakpoint     keep y   0x0800227a in cortex_m_rt::HardFault_ 
                                           at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.13/src/lib.rs:560
4       breakpoint     keep y   0x0800106c in panic_itm::panic 
                                           at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-itm-0.4.2/src/lib.rs:47

(gdb) c
Continuing.

Breakpoint 4, panic_itm::panic (info=0x20009fa0) at ~/.cargo/registry/src/github.com-1ecc6299db9ec823/panic-itm-0.4.2/src/lib.rs:47
47          interrupt::disable();
</code></pre>
<p>You'll notice that nothing got printed on the <code>itmdump</code> console this time. If
you resume the program using <code>continue</code> then a new line will be printed.</p>
<p>In a later section we'll look into other simpler communication protocols.</p>
<p>Finally, enter the <code>q</code> command to quit and it quits immediately without asking for confirmation:</p>
<pre><code class="language-text">(gdb) q
Detaching from program: ~/prgs/rust/tutorial/embedded-discovery/target/thumbv7em-none-eabihf/debug/hello-world, Remote target
Ending remote debugging.
[Inferior 1 (Remote target) detached]
</code></pre>
<p>As an even shorter sequence you can type <code>Ctrl-d</code>, which eliminates
one keystroke!</p>
<blockquote>
<p><strong>NOTE</strong> In this case the <code>(gdb)</code> prompt is overwritten with <code>quit)</code></p>
</blockquote>
<pre><code class="language-text">quit)
Detaching from program: ~/prgs/rust/tutorial/embedded-discovery/target/thumbv7em-none-eabihf/debug/hello-world, Remote target
Ending remote debugging.
[Inferior 1 (Remote target) detached]
</code></pre>

                    </main>

                    <nav class="nav-wrapper" aria-label="Page navigation">
                        <!-- Mobile navigation buttons -->
                            <a rel="prev" href="../06-hello-world/index.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
                                <i class="fa fa-angle-left"></i>
                            </a>

                            <a rel="next" href="../07-registers/index.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
                                <i class="fa fa-angle-right"></i>
                            </a>

                        <div style="clear: both"></div>
                    </nav>
                </div>
            </div>

            <nav class="nav-wide-wrapper" aria-label="Page navigation">
                    <a rel="prev" href="../06-hello-world/index.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
                        <i class="fa fa-angle-left"></i>
                    </a>

                    <a rel="next" href="../07-registers/index.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
                        <i class="fa fa-angle-right"></i>
                    </a>
            </nav>

        </div>




        <script type="text/javascript">
            window.playground_copyable = true;
        </script>


        <script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../mark.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../searcher.js" type="text/javascript" charset="utf-8"></script>

        <script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../highlight.js" type="text/javascript" charset="utf-8"></script>
        <script src="../book.js" type="text/javascript" charset="utf-8"></script>

        <!-- Custom JS scripts -->


    </body>
</html>
